Activity and State Modeling

DUE:
11:59PM, Wednesday 10 December 2014

15 points

Objectives

Practice modeling using activity diagrams and state machine diagrams

Tasks

A high level description of an auction application is provided below.
Read the description and answer questions 1 and 2 that follow. Feel free
to use your imagination to fill in specific details in case they are not
provided or if you aren't familiar with the auction domain.

An auction application involves buyers, sellers, and other users.
Buyers and sellers must have accounts in order to place bids, purchase
items, create a new auction, or ship items. Other users may use the auction
application to search for items or browse through categories.

An auction must be created for an item to be sold in a certain category.
According to Wikipedia, an English auction "is the type of auction commonly
used by the English auction houses like Sotheby's, Christie's, and Phillips.
Participants bid openly against one another, with each bid being higher than
the previous bid. The auction ends when no participant is willing to bid
further (and the auction time is over), or when a pre-determined
buy-out price is reached, at which point the highest bidder pays
the price. The seller may set a reserve price and if the auction
fails to have a bid equal to or higher than the reserve, the item remains
unsold."

Draw an activity diagram showing a typical workflow for a buyer
and seller in the same diagram. Use separate swimlanes for the buyer
and seller.

Draw a state machine diagram showing the state of an auction
(i.e., instance of the auction concept). Show the states starting from
the initialization of an auction to its finalization. Show all the events
and transitions, possible guard conditions, and actions (if needed).

Deliverables

Create a single PDF document, yourEID.pdf that
contains the following:

An image of the activity diagram.

An image of the state machine diagram.

A brief overview explaining your diagrams, especially your rationale
behind the decisions you made when you created them.